The numbe r of pavi ng st ones eac h measuring 2.5 m × 2 m required to pave a rectangular courtyard 30m long and 17.5 m wide, are



[ A ]    80
[ B ]    105 right
[ C ]    33
[ D ]    99
Answer : Option B
Explanation :
Required number of stones = $30X17.5\over2.5X2$ = 105
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